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gimp/libgimpwidgets/gimpcolorselect.c
Michael Natterer 77439d689e Bug 584408 - If brush selection popup overlaps color gradient, clicks pass through 
Keep track of the drag state the widget is in so it doesn't get confused
by release or motion events that don't have a related press event.
2009-06-01 22:55:43 +02:00

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpcolorselect.c
* Copyright (C) 2002 Michael Natterer <mitch@gimp.org>
*
* based on color_notebook module
* Copyright (C) 1998 Austin Donnelly <austin@greenend.org.uk>
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gtk/gtk.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "gimpwidgetstypes.h"
#include "gimpcolorselector.h"
#include "gimpcolorselect.h"
#include "gimphelpui.h"
#include "gimppreviewarea.h"
#include "gimpstock.h"
#include "libgimp/libgimp-intl.h"
#define COLOR_AREA_EVENT_MASK (GDK_EXPOSURE_MASK | \
GDK_BUTTON_PRESS_MASK | \
GDK_BUTTON_RELEASE_MASK | \
GDK_BUTTON_MOTION_MASK | \
GDK_ENTER_NOTIFY_MASK)
typedef enum
{
COLOR_SELECT_HUE = 0,
COLOR_SELECT_SATURATION,
COLOR_SELECT_VALUE,
COLOR_SELECT_RED,
COLOR_SELECT_GREEN,
COLOR_SELECT_BLUE,
COLOR_SELECT_ALPHA,
COLOR_SELECT_HUE_SATURATION,
COLOR_SELECT_HUE_VALUE,
COLOR_SELECT_SATURATION_VALUE,
COLOR_SELECT_RED_GREEN,
COLOR_SELECT_RED_BLUE,
COLOR_SELECT_GREEN_BLUE
} ColorSelectFillType;
typedef enum
{
UPDATE_VALUES = 1 << 0,
UPDATE_POS = 1 << 1,
UPDATE_XY_COLOR = 1 << 2,
UPDATE_Z_COLOR = 1 << 3,
UPDATE_CALLER = 1 << 6
} ColorSelectUpdateType;
typedef enum
{
DRAG_NONE,
DRAG_XY,
DRAG_Z
} ColorSelectDragMode;
#define GIMP_COLOR_SELECT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_COLOR_SELECT, GimpColorSelectClass))
#define GIMP_IS_COLOR_SELECT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_COLOR_SELECT))
#define GIMP_COLOR_SELECT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_COLOR_SELECT, GimpColorSelectClass))
typedef struct _GimpColorSelectClass GimpColorSelectClass;
struct _GimpColorSelect
{
GimpColorSelector parent_instance;
GtkWidget *toggle_box;
GtkWidget *xy_color;
GtkWidget *z_color;
gint pos[3];
ColorSelectFillType z_color_fill;
ColorSelectFillType xy_color_fill;
GdkGC *gc;
ColorSelectDragMode drag_mode;
};
struct _GimpColorSelectClass
{
GimpColorSelectorClass parent_class;
};
typedef struct _ColorSelectFill ColorSelectFill;
typedef void (* ColorSelectFillUpdateProc) (ColorSelectFill *color_select_fill);
struct _ColorSelectFill
{
guchar *buffer;
gint y;
gint width;
gint height;
GimpRGB rgb;
GimpHSV hsv;
ColorSelectFillUpdateProc update;
};
static void gimp_color_select_unrealize (GtkWidget *widget);
static void gimp_color_select_togg_visible (GimpColorSelector *selector,
gboolean visible);
static void gimp_color_select_togg_sensitive (GimpColorSelector *selector,
gboolean sensitive);
static void gimp_color_select_set_color (GimpColorSelector *selector,
const GimpRGB *rgb,
const GimpHSV *hsv);
static void gimp_color_select_set_channel (GimpColorSelector *selector,
GimpColorSelectorChannel channel);
static void gimp_color_select_channel_toggled (GtkWidget *widget,
GimpColorSelect *select);
static void gimp_color_select_update (GimpColorSelect *select,
ColorSelectUpdateType type);
static void gimp_color_select_update_values (GimpColorSelect *select);
static void gimp_color_select_update_pos (GimpColorSelect *select);
#if 0
static void gimp_color_select_drop_color (GtkWidget *widget,
gint x,
gint y,
const GimpRGB *color,
gpointer data);
#endif
static void gimp_color_select_xy_size_allocate (GtkWidget *widget,
GtkAllocation *allocation,
GimpColorSelect *select);
static gboolean gimp_color_select_xy_expose (GtkWidget *widget,
GdkEventExpose *eevent,
GimpColorSelect *select);
static gboolean gimp_color_select_xy_events (GtkWidget *widget,
GdkEvent *event,
GimpColorSelect *select);
static void gimp_color_select_z_size_allocate (GtkWidget *widget,
GtkAllocation *allocation,
GimpColorSelect *select);
static gboolean gimp_color_select_z_expose (GtkWidget *widget,
GdkEventExpose *eevent,
GimpColorSelect *select);
static gboolean gimp_color_select_z_events (GtkWidget *widet,
GdkEvent *event,
GimpColorSelect *select);
static void gimp_color_select_image_fill (GtkWidget *widget,
ColorSelectFillType fill_type,
const GimpHSV *hsv,
const GimpRGB *rgb);
static void gimp_color_select_draw_z_marker (GimpColorSelect *select,
GdkRectangle *clip);
static void gimp_color_select_draw_xy_marker (GimpColorSelect *select,
GdkRectangle *clip);
static void color_select_update_red (ColorSelectFill *csf);
static void color_select_update_green (ColorSelectFill *csf);
static void color_select_update_blue (ColorSelectFill *csf);
static void color_select_update_hue (ColorSelectFill *csf);
static void color_select_update_saturation (ColorSelectFill *csf);
static void color_select_update_value (ColorSelectFill *csf);
static void color_select_update_red_green (ColorSelectFill *csf);
static void color_select_update_red_blue (ColorSelectFill *csf);
static void color_select_update_green_blue (ColorSelectFill *csf);
static void color_select_update_hue_saturation (ColorSelectFill *csf);
static void color_select_update_hue_value (ColorSelectFill *csf);
static void color_select_update_saturation_value (ColorSelectFill *csf);
G_DEFINE_TYPE (GimpColorSelect, gimp_color_select, GIMP_TYPE_COLOR_SELECTOR)
#define parent_class gimp_color_select_parent_class
static const ColorSelectFillUpdateProc update_procs[] =
{
color_select_update_hue,
color_select_update_saturation,
color_select_update_value,
color_select_update_red,
color_select_update_green,
color_select_update_blue,
NULL, /* alpha */
color_select_update_hue_saturation,
color_select_update_hue_value,
color_select_update_saturation_value,
color_select_update_red_green,
color_select_update_red_blue,
color_select_update_green_blue,
};
static void
gimp_color_select_class_init (GimpColorSelectClass *klass)
{
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GimpColorSelectorClass *selector_class = GIMP_COLOR_SELECTOR_CLASS (klass);
widget_class->unrealize = gimp_color_select_unrealize;
selector_class->name = "GIMP";
selector_class->help_id = "gimp-colorselector-gimp";
selector_class->stock_id = GIMP_STOCK_WILBER;
selector_class->set_toggles_visible = gimp_color_select_togg_visible;
selector_class->set_toggles_sensitive = gimp_color_select_togg_sensitive;
selector_class->set_color = gimp_color_select_set_color;
selector_class->set_channel = gimp_color_select_set_channel;
}
static void
gimp_color_select_init (GimpColorSelect *select)
{
GtkWidget *hbox;
GtkWidget *frame;
select->z_color_fill = COLOR_SELECT_HUE;
select->xy_color_fill = COLOR_SELECT_SATURATION_VALUE;
select->gc = NULL;
select->drag_mode = DRAG_NONE;
hbox = gtk_hbox_new (FALSE, 4);
gtk_box_pack_start (GTK_BOX (select), hbox, TRUE, TRUE, 0);
gtk_widget_show (hbox);
/* The x/y component preview */
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (hbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
select->xy_color = gimp_preview_area_new ();
gtk_widget_set_size_request (select->xy_color,
GIMP_COLOR_SELECTOR_SIZE,
GIMP_COLOR_SELECTOR_SIZE);
gtk_widget_set_events (select->xy_color, COLOR_AREA_EVENT_MASK);
gtk_container_add (GTK_CONTAINER (frame), select->xy_color);
gtk_widget_show (select->xy_color);
g_signal_connect (select->xy_color, "size-allocate",
G_CALLBACK (gimp_color_select_xy_size_allocate),
select);
g_signal_connect_after (select->xy_color, "expose-event",
G_CALLBACK (gimp_color_select_xy_expose),
select);
g_signal_connect (select->xy_color, "event",
G_CALLBACK (gimp_color_select_xy_events),
select);
#if 0
gimp_dnd_color_dest_add (select->xy_color, gimp_color_select_drop_color,
select);
#endif
/* The z component preview */
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (hbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
select->z_color = gimp_preview_area_new ();
gtk_widget_set_size_request (select->z_color,
GIMP_COLOR_SELECTOR_BAR_SIZE, -1);
gtk_widget_set_events (select->z_color, COLOR_AREA_EVENT_MASK);
gtk_container_add (GTK_CONTAINER (frame), select->z_color);
gtk_widget_show (select->z_color);
g_signal_connect (select->z_color, "size-allocate",
G_CALLBACK (gimp_color_select_z_size_allocate),
select);
g_signal_connect_after (select->z_color, "expose-event",
G_CALLBACK (gimp_color_select_z_expose),
select);
g_signal_connect (select->z_color, "event",
G_CALLBACK (gimp_color_select_z_events),
select);
select->toggle_box = gtk_vbox_new (FALSE, 2);
gtk_box_pack_start (GTK_BOX (hbox), select->toggle_box, FALSE, FALSE, 0);
gtk_widget_show (select->toggle_box);
/* channel toggles */
{
GimpColorSelectorChannel channel;
GEnumClass *enum_class;
GSList *group = NULL;
enum_class = g_type_class_ref (GIMP_TYPE_COLOR_SELECTOR_CHANNEL);
for (channel = GIMP_COLOR_SELECTOR_HUE;
channel < GIMP_COLOR_SELECTOR_ALPHA;
channel++)
{
GimpEnumDesc *enum_desc;
GtkWidget *button;
enum_desc = gimp_enum_get_desc (enum_class, channel);
button = gtk_radio_button_new_with_mnemonic (group,
gettext (enum_desc->value_desc));
group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (button));
gtk_toggle_button_set_mode (GTK_TOGGLE_BUTTON (button), FALSE);
gtk_box_pack_start (GTK_BOX (select->toggle_box), button,
TRUE, TRUE, 0);
gtk_widget_show (button);
g_object_set_data (G_OBJECT (button), "channel",
GINT_TO_POINTER (channel));
if (channel == GIMP_COLOR_SELECTOR_HUE)
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
gimp_help_set_help_data (button, gettext (enum_desc->value_help), NULL);
g_signal_connect (button, "toggled",
G_CALLBACK (gimp_color_select_channel_toggled),
select);
}
g_type_class_unref (enum_class);
}
}
static void
gimp_color_select_unrealize (GtkWidget *widget)
{
GimpColorSelect *select = GIMP_COLOR_SELECT (widget);
if (select->gc)
{
g_object_unref (select->gc);
select->gc = NULL;
}
GTK_WIDGET_CLASS (parent_class)->unrealize (widget);
}
static void
gimp_color_select_togg_visible (GimpColorSelector *selector,
gboolean visible)
{
GimpColorSelect *select = GIMP_COLOR_SELECT (selector);
if (visible)
gtk_widget_show (select->toggle_box);
else
gtk_widget_hide (select->toggle_box);
}
static void
gimp_color_select_togg_sensitive (GimpColorSelector *selector,
gboolean sensitive)
{
GimpColorSelect *select = GIMP_COLOR_SELECT (selector);
gtk_widget_set_sensitive (select->toggle_box, sensitive);
}
static void
gimp_color_select_set_color (GimpColorSelector *selector,
const GimpRGB *rgb,
const GimpHSV *hsv)
{
GimpColorSelect *select = GIMP_COLOR_SELECT (selector);
gimp_color_select_update (select,
UPDATE_POS | UPDATE_XY_COLOR | UPDATE_Z_COLOR);
}
static void
gimp_color_select_set_channel (GimpColorSelector *selector,
GimpColorSelectorChannel channel)
{
GimpColorSelect *select = GIMP_COLOR_SELECT (selector);
switch ((ColorSelectFillType) channel)
{
case COLOR_SELECT_HUE:
select->z_color_fill = COLOR_SELECT_HUE;
select->xy_color_fill = COLOR_SELECT_SATURATION_VALUE;
break;
case COLOR_SELECT_SATURATION:
select->z_color_fill = COLOR_SELECT_SATURATION;
select->xy_color_fill = COLOR_SELECT_HUE_VALUE;
break;
case COLOR_SELECT_VALUE:
select->z_color_fill = COLOR_SELECT_VALUE;
select->xy_color_fill = COLOR_SELECT_HUE_SATURATION;
break;
case COLOR_SELECT_RED:
select->z_color_fill = COLOR_SELECT_RED;
select->xy_color_fill = COLOR_SELECT_GREEN_BLUE;
break;
case COLOR_SELECT_GREEN:
select->z_color_fill = COLOR_SELECT_GREEN;
select->xy_color_fill = COLOR_SELECT_RED_BLUE;
break;
case COLOR_SELECT_BLUE:
select->z_color_fill = COLOR_SELECT_BLUE;
select->xy_color_fill = COLOR_SELECT_RED_GREEN;
break;
default:
break;
}
gimp_color_select_update (select,
UPDATE_POS | UPDATE_Z_COLOR | UPDATE_XY_COLOR);
}
static void
gimp_color_select_channel_toggled (GtkWidget *widget,
GimpColorSelect *select)
{
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget)))
{
GimpColorSelector *selector = GIMP_COLOR_SELECTOR (select);
GimpColorSelectorChannel channel;
channel = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (widget),
"channel"));
selector->channel = channel;
gimp_color_select_set_channel (selector, channel);
gimp_color_selector_channel_changed (selector);
}
}
static void
gimp_color_select_update (GimpColorSelect *select,
ColorSelectUpdateType update)
{
GimpColorSelector *selector = GIMP_COLOR_SELECTOR (select);
if (update & UPDATE_POS)
gimp_color_select_update_pos (select);
if (update & UPDATE_VALUES)
gimp_color_select_update_values (select);
if (update & UPDATE_XY_COLOR)
{
gimp_color_select_image_fill (select->xy_color, select->xy_color_fill,
&selector->hsv, &selector->rgb);
gtk_widget_queue_draw (select->xy_color);
}
if (update & UPDATE_Z_COLOR)
{
gimp_color_select_image_fill (select->z_color, select->z_color_fill,
&selector->hsv, &selector->rgb);
gtk_widget_queue_draw (select->z_color);
}
if (update & UPDATE_CALLER)
gimp_color_selector_color_changed (GIMP_COLOR_SELECTOR (select));
}
static void
gimp_color_select_update_values (GimpColorSelect *select)
{
GimpColorSelector *selector = GIMP_COLOR_SELECTOR (select);
switch (select->z_color_fill)
{
case COLOR_SELECT_RED:
selector->rgb.b = select->pos[0] / 255.0;
selector->rgb.g = select->pos[1] / 255.0;
selector->rgb.r = select->pos[2] / 255.0;
break;
case COLOR_SELECT_GREEN:
selector->rgb.b = select->pos[0] / 255.0;
selector->rgb.r = select->pos[1] / 255.0;
selector->rgb.g = select->pos[2] / 255.0;
break;
case COLOR_SELECT_BLUE:
selector->rgb.g = select->pos[0] / 255.0;
selector->rgb.r = select->pos[1] / 255.0;
selector->rgb.b = select->pos[2] / 255.0;
break;
case COLOR_SELECT_HUE:
selector->hsv.v = select->pos[0] / 255.0;
selector->hsv.s = select->pos[1] / 255.0;
selector->hsv.h = select->pos[2] / 255.0;
break;
case COLOR_SELECT_SATURATION:
selector->hsv.v = select->pos[0] / 255.0;
selector->hsv.h = select->pos[1] / 255.0;
selector->hsv.s = select->pos[2] / 255.0;
break;
case COLOR_SELECT_VALUE:
selector->hsv.s = select->pos[0] / 255.0;
selector->hsv.h = select->pos[1] / 255.0;
selector->hsv.v = select->pos[2] / 255.0;
break;
default:
break;
}
switch (select->z_color_fill)
{
case COLOR_SELECT_RED:
case COLOR_SELECT_GREEN:
case COLOR_SELECT_BLUE:
gimp_rgb_to_hsv (&selector->rgb, &selector->hsv);
break;
case COLOR_SELECT_HUE:
case COLOR_SELECT_SATURATION:
case COLOR_SELECT_VALUE:
gimp_hsv_to_rgb (&selector->hsv, &selector->rgb);
break;
default:
break;
}
}
static void
gimp_color_select_update_pos (GimpColorSelect *select)
{
GimpColorSelector *selector = GIMP_COLOR_SELECTOR (select);
switch (select->z_color_fill)
{
case COLOR_SELECT_RED:
select->pos[0] = ROUND (selector->rgb.b * 255.0);
select->pos[1] = ROUND (selector->rgb.g * 255.0);
select->pos[2] = ROUND (selector->rgb.r * 255.0);
break;
case COLOR_SELECT_GREEN:
select->pos[0] = ROUND (selector->rgb.b * 255.0);
select->pos[1] = ROUND (selector->rgb.r * 255.0);
select->pos[2] = ROUND (selector->rgb.g * 255.0);
break;
case COLOR_SELECT_BLUE:
select->pos[0] = ROUND (selector->rgb.g * 255.0);
select->pos[1] = ROUND (selector->rgb.r * 255.0);
select->pos[2] = ROUND (selector->rgb.b * 255.0);
break;
case COLOR_SELECT_HUE:
select->pos[0] = ROUND (selector->hsv.v * 255.0);
select->pos[1] = ROUND (selector->hsv.s * 255.0);
select->pos[2] = ROUND (selector->hsv.h * 255.0);
break;
case COLOR_SELECT_SATURATION:
select->pos[0] = ROUND (selector->hsv.v * 255.0);
select->pos[1] = ROUND (selector->hsv.h * 255.0);
select->pos[2] = ROUND (selector->hsv.s * 255.0);
break;
case COLOR_SELECT_VALUE:
select->pos[0] = ROUND (selector->hsv.s * 255.0);
select->pos[1] = ROUND (selector->hsv.h * 255.0);
select->pos[2] = ROUND (selector->hsv.v * 255.0);
break;
default:
break;
}
}
#if 0
static void
gimp_color_select_drop_color (GtkWidget *widget,
gint x,
gint y,
const GimpRGB *color,
gpointer data)
{
GimpColorSelect *select = GIMP_COLOR_SELECT (data);
select->rgb = *color;
gimp_color_select_update_hsv_values (select);
gimp_color_select_update (select,
UPDATE_POS | UPDATE_XY_COLOR | UPDATE_Z_COLOR |
UPDATE_CALLER);
}
#endif
static void
gimp_color_select_xy_size_allocate (GtkWidget *widget,
GtkAllocation *allocation,
GimpColorSelect *select)
{
gimp_color_select_update (select, UPDATE_XY_COLOR);
}
static gboolean
gimp_color_select_xy_expose (GtkWidget *widget,
GdkEventExpose *event,
GimpColorSelect *select)
{
if (! select->gc)
select->gc = gdk_gc_new (gtk_widget_get_window (widget));
gimp_color_select_draw_xy_marker (select, &event->area);
return TRUE;
}
static gboolean
gimp_color_select_xy_events (GtkWidget *widget,
GdkEvent *event,
GimpColorSelect *select)
{
gint width, height;
gint x, y;
switch (event->type)
{
case GDK_BUTTON_PRESS:
{
GdkEventButton *bevent = (GdkEventButton *) event;
if (select->drag_mode != DRAG_NONE || bevent->button != 1)
return FALSE;
x = bevent->x;
y = bevent->y;
gdk_pointer_grab (gtk_widget_get_window (select->xy_color), FALSE,
GDK_POINTER_MOTION_HINT_MASK |
GDK_BUTTON_MOTION_MASK |
GDK_BUTTON_RELEASE_MASK,
NULL, NULL, bevent->time);
select->drag_mode = DRAG_XY;
}
break;
case GDK_BUTTON_RELEASE:
{
GdkEventButton *bevent = (GdkEventButton *) event;
if (select->drag_mode != DRAG_XY || bevent->button != 1)
return FALSE;
x = bevent->x;
y = bevent->y;
gdk_display_pointer_ungrab (gtk_widget_get_display (widget),
bevent->time);
select->drag_mode = DRAG_NONE;
}
break;
case GDK_MOTION_NOTIFY:
{
GdkEventMotion *mevent = (GdkEventMotion *) event;
if (select->drag_mode != DRAG_XY)
return FALSE;
x = mevent->x;
y = mevent->y;
}
break;
default:
return FALSE;
}
gimp_color_select_draw_xy_marker (select, NULL);
width = select->xy_color->allocation.width;
height = select->xy_color->allocation.height;
if (width > 1 && height > 1)
{
select->pos[0] = (x * 255) / (width - 1);
select->pos[1] = 255 - (y * 255) / (height - 1);
}
select->pos[0] = CLAMP (select->pos[0], 0, 255);
select->pos[1] = CLAMP (select->pos[1], 0, 255);
gimp_color_select_draw_xy_marker (select, NULL);
gimp_color_select_update (select, UPDATE_VALUES | UPDATE_CALLER);
/* Ask for more motion events in case the event was a hint */
gdk_event_request_motions ((GdkEventMotion *) event);
return TRUE;
}
static void
gimp_color_select_z_size_allocate (GtkWidget *widget,
GtkAllocation *allocation,
GimpColorSelect *select)
{
gimp_color_select_update (select, UPDATE_Z_COLOR);
}
static gboolean
gimp_color_select_z_expose (GtkWidget *widget,
GdkEventExpose *event,
GimpColorSelect *select)
{
if (! select->gc)
select->gc = gdk_gc_new (gtk_widget_get_window (widget));
gimp_color_select_draw_z_marker (select, &event->area);
return TRUE;
}
static gboolean
gimp_color_select_z_events (GtkWidget *widget,
GdkEvent *event,
GimpColorSelect *select)
{
gint height;
gint z;
switch (event->type)
{
case GDK_BUTTON_PRESS:
{
GdkEventButton *bevent = (GdkEventButton *) event;
if (select->drag_mode != DRAG_NONE || bevent->button != 1)
return FALSE;
z = bevent->y;
gdk_pointer_grab (gtk_widget_get_window (select->z_color), FALSE,
GDK_POINTER_MOTION_HINT_MASK |
GDK_BUTTON_MOTION_MASK |
GDK_BUTTON_RELEASE_MASK,
NULL, NULL, bevent->time);
select->drag_mode = DRAG_Z;
}
break;
case GDK_BUTTON_RELEASE:
{
GdkEventButton *bevent = (GdkEventButton *) event;
if (select->drag_mode != DRAG_Z || bevent->button != 1)
return FALSE;
z = bevent->y;
gdk_display_pointer_ungrab (gtk_widget_get_display (widget),
bevent->time);
select->drag_mode = DRAG_NONE;
}
break;
case GDK_MOTION_NOTIFY:
{
GdkEventMotion *mevent = (GdkEventMotion *) event;
if (select->drag_mode != DRAG_Z)
return FALSE;
z = mevent->y;
}
break;
default:
return FALSE;
}
gimp_color_select_draw_z_marker (select, NULL);
height = select->z_color->allocation.height;
if (height > 1)
select->pos[2] = 255 - (z * 255) / (height - 1);
select->pos[2] = CLAMP (select->pos[2], 0, 255);
gimp_color_select_draw_z_marker (select, NULL);
gimp_color_select_update (select,
UPDATE_VALUES | UPDATE_XY_COLOR | UPDATE_CALLER);
/* Ask for more motion events in case the event was a hint */
gdk_event_request_motions ((GdkEventMotion *) event);
return TRUE;
}
static void
gimp_color_select_image_fill (GtkWidget *preview,
ColorSelectFillType fill_type,
const GimpHSV *hsv,
const GimpRGB *rgb)
{
ColorSelectFill csf;
csf.update = update_procs[fill_type];
csf.width = preview->allocation.width;
csf.height = preview->allocation.height;
csf.hsv = *hsv;
csf.rgb = *rgb;
csf.buffer = g_alloca (csf.width * 3);
for (csf.y = 0; csf.y < csf.height; csf.y++)
{
{
if (csf.update)
(* csf.update) (&csf);
gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview),
0, csf.y, csf.width, 1,
GIMP_RGB_IMAGE,
csf.buffer, csf.width * 3);
}
}
}
static void
gimp_color_select_draw_z_marker (GimpColorSelect *select,
GdkRectangle *clip)
{
gint width;
gint height;
gint y;
gint minx;
gint miny;
if (! select->gc)
return;
width = select->z_color->allocation.width;
height = select->z_color->allocation.height;
if (width < 1 || height < 1)
return;
y = (height - 1) - ((height - 1) * select->pos[2]) / 255;
minx = 0;
miny = 0;
if (clip)
{
width = MIN (width, clip->x + clip->width);
height = MIN (height, clip->y + clip->height);
minx = MAX (0, clip->x);
miny = MAX (0, clip->y);
}
if (y >= miny && y < height)
{
gdk_gc_set_function (select->gc, GDK_INVERT);
gdk_draw_line (gtk_widget_get_window (select->z_color),
select->gc, minx, y, width - 1, y);
gdk_gc_set_function (select->gc, GDK_COPY);
}
}
static void
gimp_color_select_draw_xy_marker (GimpColorSelect *select,
GdkRectangle *clip)
{
gint width;
gint height;
gint x, y;
gint minx, miny;
if (! select->gc)
return;
width = select->xy_color->allocation.width;
height = select->xy_color->allocation.height;
if (width < 1 || height < 1)
return;
x = ((width - 1) * select->pos[0]) / 255;
y = (height - 1) - ((height - 1) * select->pos[1]) / 255;
minx = 0;
miny = 0;
gdk_gc_set_function (select->gc, GDK_INVERT);
if (clip)
{
width = MIN (width, clip->x + clip->width);
height = MIN (height, clip->y + clip->height);
minx = MAX (0, clip->x);
miny = MAX (0, clip->y);
}
if (y >= miny && y < height)
gdk_draw_line (gtk_widget_get_window (select->xy_color),
select->gc, minx, y, width - 1, y);
if (x >= minx && x < width)
gdk_draw_line (gtk_widget_get_window (select->xy_color),
select->gc, x, miny, x, height - 1);
gdk_gc_set_function (select->gc, GDK_COPY);
}
static void
color_select_update_red (ColorSelectFill *csf)
{
guchar *p;
gint i, r;
p = csf->buffer;
r = (csf->height - csf->y + 1) * 255 / csf->height;
if (r < 0)
r = 0;
if (r > 255)
r = 255;
for (i = 0; i < csf->width; i++)
{
*p++ = r;
*p++ = 0;
*p++ = 0;
}
}
static void
color_select_update_green (ColorSelectFill *csf)
{
guchar *p;
gint i, g;
p = csf->buffer;
g = (csf->height - csf->y + 1) * 255 / csf->height;
if (g < 0)
g = 0;
if (g > 255)
g = 255;
for (i = 0; i < csf->width; i++)
{
*p++ = 0;
*p++ = g;
*p++ = 0;
}
}
static void
color_select_update_blue (ColorSelectFill *csf)
{
guchar *p;
gint i, b;
p = csf->buffer;
b = (csf->height - csf->y + 1) * 255 / csf->height;
if (b < 0)
b = 0;
if (b > 255)
b = 255;
for (i = 0; i < csf->width; i++)
{
*p++ = 0;
*p++ = 0;
*p++ = b;
}
}
static void
color_select_update_hue (ColorSelectFill *csf)
{
guchar *p;
gfloat h, f;
gint r, g, b;
gint i;
p = csf->buffer;
h = csf->y * 360.0 / csf->height;
h = CLAMP (360 - h, 0, 360);
h /= 60;
f = (h - (int) h) * 255;
r = g = b = 0;
switch ((int) h)
{
case 0:
r = 255;
g = f;
b = 0;
break;
case 1:
r = 255 - f;
g = 255;
b = 0;
break;
case 2:
r = 0;
g = 255;
b = f;
break;
case 3:
r = 0;
g = 255 - f;
b = 255;
break;
case 4:
r = f;
g = 0;
b = 255;
break;
case 5:
r = 255;
g = 0;
b = 255 - f;
break;
}
for (i = 0; i < csf->width; i++)
{
*p++ = r;
*p++ = g;
*p++ = b;
}
}
static void
color_select_update_saturation (ColorSelectFill *csf)
{
guchar *p;
gint s;
gint i;
p = csf->buffer;
s = csf->y * 255 / csf->height;
if (s < 0)
s = 0;
if (s > 255)
s = 255;
s = 255 - s;
for (i = 0; i < csf->width; i++)
{
*p++ = s;
*p++ = s;
*p++ = s;
}
}
static void
color_select_update_value (ColorSelectFill *csf)
{
guchar *p;
gint v;
gint i;
p = csf->buffer;
v = csf->y * 255 / csf->height;
if (v < 0)
v = 0;
if (v > 255)
v = 255;
v = 255 - v;
for (i = 0; i < csf->width; i++)
{
*p++ = v;
*p++ = v;
*p++ = v;
}
}
static void
color_select_update_red_green (ColorSelectFill *csf)
{
guchar *p;
gint i, r, b;
gfloat g, dg;
p = csf->buffer;
b = ROUND (csf->rgb.b * 255.0);
r = (csf->height - csf->y + 1) * 255 / csf->height;
if (r < 0)
r = 0;
if (r > 255)
r = 255;
g = 0;
dg = 255.0 / csf->width;
for (i = 0; i < csf->width; i++)
{
*p++ = r;
*p++ = g;
*p++ = b;
g += dg;
}
}
static void
color_select_update_red_blue (ColorSelectFill *csf)
{
guchar *p;
gint i, r, g;
gfloat b, db;
p = csf->buffer;
g = ROUND (csf->rgb.g * 255.0);
r = (csf->height - csf->y + 1) * 255 / csf->height;
if (r < 0)
r = 0;
if (r > 255)
r = 255;
b = 0;
db = 255.0 / csf->width;
for (i = 0; i < csf->width; i++)
{
*p++ = r;
*p++ = g;
*p++ = b;
b += db;
}
}
static void
color_select_update_green_blue (ColorSelectFill *csf)
{
guchar *p;
gint i, g, r;
gfloat b, db;
p = csf->buffer;
r = ROUND (csf->rgb.r * 255.0);
g = (csf->height - csf->y + 1) * 255 / csf->height;
if (g < 0)
g = 0;
if (g > 255)
g = 255;
b = 0;
db = 255.0 / csf->width;
for (i = 0; i < csf->width; i++)
{
*p++ = r;
*p++ = g;
*p++ = b;
b += db;
}
}
static void
color_select_update_hue_saturation (ColorSelectFill *csf)
{
guchar *p;
gfloat h, v, s, ds;
gint f;
gint i;
p = csf->buffer;
h = 360 - (csf->y * 360 / csf->height);
if (h < 0)
h = 0;
if (h > 359)
h = 359;
h /= 60;
f = (h - (int) h) * 255;
s = 0;
ds = 1.0 / csf->width;
v = csf->hsv.v;
switch ((int) h)
{
case 0:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255;
*p++ = v * (255 - (s * (255 - f)));
*p++ = v * 255 * (1 - s);
s += ds;
}
break;
case 1:
for (i = 0; i < csf->width; i++)
{
*p++ = v * (255 - s * f);
*p++ = v * 255;
*p++ = v * 255 * (1 - s);
s += ds;
}
break;
case 2:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255 * (1 - s);
*p++ = v *255;
*p++ = v * (255 - (s * (255 - f)));
s += ds;
}
break;
case 3:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255 * (1 - s);
*p++ = v * (255 - s * f);
*p++ = v * 255;
s += ds;
}
break;
case 4:
for (i = 0; i < csf->width; i++)
{
*p++ = v * (255 - (s * (255 - f)));
*p++ = v * (255 * (1 - s));
*p++ = v * 255;
s += ds;
}
break;
case 5:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255;
*p++ = v * 255 * (1 - s);
*p++ = v * (255 - s * f);
s += ds;
}
break;
}
}
static void
color_select_update_hue_value (ColorSelectFill *csf)
{
guchar *p;
gfloat h, v, dv, s;
gint f;
gint i;
p = csf->buffer;
h = 360 - (csf->y * 360 / csf->height);
if (h < 0)
h = 0;
if (h > 359)
h = 359;
h /= 60;
f = (h - (int) h) * 255;
v = 0;
dv = 1.0 / csf->width;
s = csf->hsv.s;
switch ((int) h)
{
case 0:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255;
*p++ = v * (255 - (s * (255 - f)));
*p++ = v * 255 * (1 - s);
v += dv;
}
break;
case 1:
for (i = 0; i < csf->width; i++)
{
*p++ = v * (255 - s * f);
*p++ = v * 255;
*p++ = v * 255 * (1 - s);
v += dv;
}
break;
case 2:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255 * (1 - s);
*p++ = v *255;
*p++ = v * (255 - (s * (255 - f)));
v += dv;
}
break;
case 3:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255 * (1 - s);
*p++ = v * (255 - s * f);
*p++ = v * 255;
v += dv;
}
break;
case 4:
for (i = 0; i < csf->width; i++)
{
*p++ = v * (255 - (s * (255 - f)));
*p++ = v * (255 * (1 - s));
*p++ = v * 255;
v += dv;
}
break;
case 5:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255;
*p++ = v * 255 * (1 - s);
*p++ = v * (255 - s * f);
v += dv;
}
break;
}
}
static void
color_select_update_saturation_value (ColorSelectFill *csf)
{
guchar *p;
gfloat h, v, dv, s;
gint f;
gint i;
p = csf->buffer;
s = (gfloat) csf->y / csf->height;
if (s < 0)
s = 0;
if (s > 1)
s = 1;
s = 1 - s;
h = (gfloat) csf->hsv.h * 360.0;
if (h >= 360)
h -= 360;
h /= 60;
f = (h - (gint) h) * 255;
v = 0;
dv = 1.0 / csf->width;
switch ((gint) h)
{
case 0:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255;
*p++ = v * (255 - (s * (255 - f)));
*p++ = v * 255 * (1 - s);
v += dv;
}
break;
case 1:
for (i = 0; i < csf->width; i++)
{
*p++ = v * (255 - s * f);
*p++ = v * 255;
*p++ = v * 255 * (1 - s);
v += dv;
}
break;
case 2:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255 * (1 - s);
*p++ = v *255;
*p++ = v * (255 - (s * (255 - f)));
v += dv;
}
break;
case 3:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255 * (1 - s);
*p++ = v * (255 - s * f);
*p++ = v * 255;
v += dv;
}
break;
case 4:
for (i = 0; i < csf->width; i++)
{
*p++ = v * (255 - (s * (255 - f)));
*p++ = v * (255 * (1 - s));
*p++ = v * 255;
v += dv;
}
break;
case 5:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255;
*p++ = v * 255 * (1 - s);
*p++ = v * (255 - s * f);
v += dv;
}
break;
}
}
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